From: Rick DeNatale <rick.denatale@...>
Date: 2009-03-06T02:50:52+09:00
Subject: Re: Any solutions to Ruby's inconsistencies?

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On Thu, Mar 5, 2009 at 11:52 AM, C. Dagnon <c-soc-rubyforum@dagnon.net>wrote:

>
> While I think I can find a use for reject and
> inject, select doesn't make much sense to me.  I'll have to see if I can
> fit that into my mindmap..


Think of it selecting the elements of the enumerable for which the block is
'true'.

Another analogy is to an SQL SELECT statement with the block taking the part
of the WHERE clause.

The *ect methods are evidence of the influence of Smalltalk on Ruby,
particularly inject, which is a Smalltalk variant on the more common reduce
operation which allows injection of an initial value outside of the receiver
into the sequence.

Ruby 1.9 adds the alias :reduce to Enumerable#inject.
-- 
Rick DeNatale

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